Home / 5,521.48-7,620.18-4,121.80

Finding the Fourth Proportional to 5,521.48, 7,620.18 and 4,121.80

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Solution

The fourth proportional to 5,521.48, 7,620.18 and 4,121.80 is: 5,688.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,521.48 : 7,620.18 = 4,121.80 : x
  2. Step 2: Convert to fraction form
    5,521.48/7,620.18 = 4,121.80/x
  3. Step 3: Cross multiply
    5,521.48x = 7,620.18 × 4,121.80
  4. Step 4: Simplify right side
    5,521.48x = 31,408,857.92
  5. Step 5: Solve for x
    x = 31,408,857.92/5,521.48
  6. Step 6: Final answer
    x = 5,688.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.